Radiating shield for hot-air furnaces



v C. C. FRAUTZ RADIAIING SHIELD FOR HOT AIR FURNACES Aug. 17, 1926.1,596,092

Filed July 50, 1925 v J2 P ea GR B F M W nace and Patented Aug. 17,1926.

UNITED STATES PATENT 0mm.

Oil-TABLES C. FRA'UTZ, OF GENEVA, NEV I YORK, ASSIGNOR TO ANDES RANGEAND'FUR- NACE CORPORATION, OF GENEVA, 'NEW YORK, A CORIORATION OF NEWYORK. 1

RADIATING SHIELD FOR HOT-AIR FURNACES.

Application filed Jul so, 1925. serialnaaai ii.

The object of this invention is to provide a radiating shieldintermediate of the fire pot and outer casing of a hot air furbetweenthe radiator flues thereof for the purpose of increasing the heatingeflic'iency 0f the furnace.

This and other objects of this invention will be fully illustrated inthe drawing, described in the specification and pointed out in theclaims at the end thereof.

In the accompanying drawing: Figure 1 is a vertical sectional view ofthe furnace, the section being taken on the line 1 1 of Figure 2.

Figure 2 is ,a horizontal sectional view of the furnace, the sectionbeing taken on the line 2 2 of Figure 1. V

Figure 3 is a detail perspective view .of the double radiator providedin the furnace and the radiating shield mounted between them. V

In the several figures of the drawing, like reference numerals indicatelike parts.

The radiating shield forming the subject matter of my present inventionis adapted for use in hot air furnaces especially in types having aradiator built in two sections, one above the other surroundin .thesides and rear of the fire box.

uch a furnace is illustrated in the figures of the drawing in whichreference numeral 1 indicates the fire box of the furnace, 2 the shellof the furnace and 3 the radiator suitably supported on the fire box 1and located between it and the inside of the shell 2. The shell orcasing 2 of the furnace has suitable cold air inlets 4, 4 through whichthe air is admitted into the casing to be heated therein by the fire potand the radiator surrounding it. The heated air passes out through therisers 5, 5 in the top of the casing where it is distributed into thedifferent sections of the house.

The radiator 3 of this furnace is made up in two horizontal U shapedsections located one above the other. The two sections are connectedwitheach other at their ends by the vertical fiues 6 and '7. The uppersection of the radiator is provided with an inlet 8 in the middlethereof which faces the inside of the yoke and connects to the outlet ofthe fire box 1 as illustrated in Figure 2. The hot gases or products ofcombustion thus pass first into the upper section of the radiator at therear thereof where they are. divided and travel to the front end of theradiator through both sides thereof. From the front ends of the upperradiator sectionv the hot. gases orproductsof combustion pass downthrough the -ver-.

tical connecting fiues G and 7 into the front end of the lower radiatorsection where they again pass to the rear and pass out united throughthe outlet 9 at the rear of the lower radiator section. I

The upper radiator section is illustrated with both an inlet 8 and anoutlet 10. The outlet, however,'is ordinarily closed by the damper 11,and is'only used when a strong and quick draft is desired from the firepot into the chimney when starting the fire in thefire pot. Noheating'effect or very little is secured when the hot gases are allowedto escape directly into the chimney without first passing through theradiator sections. This of course is only the case when the fire isstarted and as soon as it is started the damper 11 is closed so that thegases are forced to pass through the radiator sections as above pointedout. The sections of the radiator present a large radiating surface tothe air passing through the casing of v the furnace. This radiatingsurface is not only materially increased by the radiating shields 12 and13 but heat radiated from the outside of the fire pot is held back fromimpinging directly against the inside of the casing where some of itwould be lostin unnecessarily heating the furnace casing.

As illustrated in the figures of the drawing the radiating shields 12and 13 are mounted between the upper and lowersections of the radiatorand close the space between them except for a short distance at therear. Lugs 14:, 1 4; are provided on both the upper and lower sectionsof the radiator and the radiating shields 12 and 13 which are preferablymade up of sheet metal are suitably bolted thereto.

The central portion of the fire pot is thus surrounded by two casings,the outer casing 2 and the casing formed by the radiator 3 and theradiating shields 12 and 13. This serves to conserve the heat radiatedfrom the fire pot within the casing 2 and prevents its conduction andloss by the casing 2 s0 that a larger percentage of heat Will beabsorbed by the air passing through the furnace.

I claim:

1. In a hot air furnace, the combination of a fire pot, a radiatorcomprising a pair of horizontal ducts located one above the other,surrounding said fire pot, a casing surrounding said radiator, aradiating shield connecting said pair of horizontal V ducts and forminga partition between said fire pot and said casing, said radiating shieldbeing adapted to intercept the heat radiated from said fire pot andradiate some of the heat given off by the gases passing through saidradiator.

2. In a hot air furnace having a fire pot and a casing surrounding it, ahorizontal radiator encircling said fire pot and connected to said firepot for the passage of hot gases from said fire pot, a radiating shieldmounted on said radiator dividing the space between said fire pot andsaid 0. In a hot air furnace, the combination of afire pot and a casingsurrounding it, 30

a horizontal upper and ahorizontal lower radiator encircling said firepot, connecting ducts connecting said upper and lower radiator with eachother and said fire pot to allow the passage of the hot gases therethru,a radiating shield connecting said upper and said lower radiatordividing the space between said fire pot'and said casing to make theheat radiating from said fire pot heat the space between said fir'e potand said. radiating shield and the heat radiating from said radiatorsheat the space between said radiating shield and said casing.

In testimony whereof I aflig my signature.

CHARLES C. FRAUTZ.

